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000 

WWUS20 KWNS 052012

SEL6

SPC WW 052012

ARZ000-LAZ000-060400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 36

NWS STORM PREDICTION CENTER NORMAN OK

210 PM CST TUE FEB 5 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       CENTRAL AND SOUTHERN ARKANSAS

       NORTHERN LOUISIANA



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 210 PM UNTIL

1000 PM CST.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE TORNADOES...LARGE HAIL TO 2.5 INCHES IN DIAMETER...

THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE

POSSIBLE IN THESE AREAS.



THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 125 STATUTE

MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST NORTHWEST OF

EL DORADO ARKANSAS TO 50 MILES EAST OF PINE BLUFF ARKANSAS.  FOR

A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU6).



REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR

TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH

AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR

THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS

AND POSSIBLE WARNINGS.



OTHER WATCH INFORMATION...CONTINUE...WW 34...WW 35...



DISCUSSION...SCATTERED THUNDERSTORMS ARE BEGINNING TO INTENSIFY FROM

NE TX INTO WRN AR...AND ADDITIONAL CONVECTION IS FORMING ALONG A

PRE-FRONTAL BAND NEAR MLU IN NRN LA.  18Z SOUNDINGS FROM LZK AND SHV

SHOW THAT THE CAP HAS WEAKENED FROM BELOW VIA ASCENT...AND THIS

TREND WILL CONTINUE THROUGH THE AFTERNOON IN CONJUNCTION WITH A LEAD

SHORTWAVE TROUGH EJECTING NEWD FROM NE TX/ERN OK TOWARD AR.  THE

COMBINATION OF MODERATE INSTABILITY...BOUNDARY LAYER DEWPOINTS IN

THE MID 60S AND VERY STRONG VERTICAL SHEAR /EFFECTIVE SRH AOA 400

M2/S2/ WILL SUPPORT A THREAT FOR LONG-LIVED SUPERCELLS CAPABLE OF

PRODUCING STRONG TORNADOES...LARGE HAIL...AND DAMAGING WINDS INTO

EARLY TONIGHT.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

450. MEAN STORM MOTION VECTOR 23050.





...THOMPSON

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